Solve -4*o = 5*w + 20, -17 = 5*w + 5*o + 8 for w.

Solve -v = r + r + 6, -4*r + 16 = -5*v for v.

-4

Solve -3*s = 115 - 109, -r - 5*s - 13 = 0 for r.

-3

Solve 0 = 5*v - 5*b + 20, 3*v + 6*b - 11*b = -22 for v.

1

Solve 4*f + 5*s + 17 = 0, 0 = f - s - 0*s - 7 for f.

2

Solve -6*r = -3*n - r - 4, -r + 2 = -n for n.

-3

Solve 2*f + w + 3 = 0, -9 = 4*f + 6*w - w for f.

-1

Solve -5 = n + b, -n = 3*b - 7*b - 20 for n.

0

Solve o - 7 = -5*s, -s = -3*o - 57 + 46 for o.

-3

Solve s - 3*t - 13 + 31 = 0, -5*s + 3*t = 30 for s.

-3

Solve 2*r - 5*v + 30 = 0, -71*r + 72*r - 6 = -v for r.

0